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Excellent writeup. I particularly liked the createApiRouteHandler pattern for keeping Next.js routes thin. How do you usually handle the 'fail-open' scenario for rate limiting and idempotency in production? If Redis is down, do you prioritize system availability over preventing duplicates, or do you have a fallback mechanism to prevent a potential 'retry storm'?
Archit Mittal
I Automate Chaos — AI workflows, n8n, Claude, and open-source automation for businesses. Turning repetitive work into one-click systems.
Great breakdown. The point about consistent error envelopes is something I wish more teams internalized early. I've seen so many APIs where every endpoint returns errors in a different shape, making client-side error handling a nightmare. One pattern I've found useful when building automation-heavy backends is wrapping idempotency keys with a hash of the request body — that way you catch accidental duplicates even when the client forgets to send the key. Do you have a preference between middleware-level vs route-level rate limiting in Next.js API routes?